There seems to be an issue with a setting in adapt-contrib-media. There doesn't seem to be an 'issues' button in the gitHub repository so I'm posting here.
If you're using mp3 audio, and you set "_pauseWhenOffScreen": true, the audio plays for a split second then stops, while the component is still on screen. I toggled between true & false for that setting a few times and it seems to fix it every time it's set to false.
Framework version: 5.15.0
Component version: 5.2.1